For use with portable fuel tanks and popular outboard engines. Made to the highest quality standards. Alcohol-resistant, suitable for use with leaded and non-leaded fuels. 3/8" I.D. hose for maximum flow. Primer bulb is injection-molded for strength and durability. Double check valve for quick priming and unrestricted flow. Non-corrosive, galvanized hose clamps. Attwood fuel hoses all meet USCG standards. Clam shell packaging.